Its R300 that evolved to R350 and now one more time to the R360 marchitecture is still based on the old 0.15µ (micron) process but will give NvIdiA a run for its money.
ATl's new baby trills along at 425+ MHz and as always the final numbers will be known just shortly before it releases the thingie.
Xbit suggested 450MHz. That sounds too high to us but it could be possible.
The memory remains DDR1 but could use DDR 2 as well. Right now we're not sure about the memory speeds.
The marchitecture remains the same, with same possible new driver features like last time, with the R350 when it introduced SM. 2.1
It will launch at the end of September and we heard that cards will be in retail shortly after the announcement.
Until the NV38 arrives, cards using it should be the fastest on the block. Until Nvidia comes up with the NV38, that is. µ